SRT对于污水脱氮过程中N2O产生的影响尚会来

29420094　　　　　　ActaScientiaeCircumstantiaeVol.29,No.4Apr.,2009:“”(No.2006BAC19B03,2007.1-2010.12);(No.ykj-2007-1063);(No.PHR20090502)SupportedbytheNationalKeyTechnologiesRDProgramofChinaduringthe“EleventhFive-year”PlanPeriod(No.2006BAC19B03),theBeijingUniversityofTechnologyPostgraduateFund(No.ykj-2007-1063)andtheFundingProjectforAcademicHumanResourcesDevelopmentinInstitutionsofHigherLearningundertheJurisdictionofBeijingMunicipality(No.PHR20090502):(1982—),,E-mail:[e-mail];＊()Biography:SHANGHuilai(1982—),male,E-mail:[e-mail];＊Correspondingauthor,,,.2009.SRTN2O[J].,29(4):754-758ShangHL,PengYZ,ZhangJR,etal.2009.EffectsofSRTonN2Oproductionduringnitrificationanddenitrification[J].ActaScientiaeCircumstantiae,29(4):754-758SRTN2O尚会来,彭永臻＊,张静蓉,王淑莹北京工业大学北京市水质科学与水环境恢复工程重点试验室,北京100022:2008-06-10　　　:2009-02-20:,9d15d,,(SRT)N2O.N2O,.N2O,9dN2O15d1.2,4.62mg·L-13.8mg·L-1.N2O,N2O,11.2%7.8%.,,96%.N2O,,N2O.:;SRT;N2O:0253-2468(2009)04-754-05　　　:X703.1　　　:AEffectsofSRTonN2OproductionduringnitrificationanddenitrificationSHANGHuilai,PENGYongzhen＊,ZHANGJingrong,WANGShuyingKeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022Received10June2008;　　　accepted20February2009Abstract:WeinvestigatedtheproductionandconversionrateofN2Oduringnitrificationanddenitrificationunderdifferentsludgeretentiontimes(SRT):9dand15d.TheresultsshowedthatnitrificationwasthemainsourceofN2O.TheN2OproductionwithSRT9dwas1.2timeshigherthanthatwithSRT15d.TheproductionandconversionrateofN2OduringnitrificationanddenitrificationunderdifferentSRTconditionswerealsoinvestigated.TheresultsturnedoutthattheN2Oproductionwas4.62mg·L-1withSRT9dand3.8mg·L-1withSRT15d.Theconversionratewas11.2%withSRT9dand7.8%withSRT15d.ThelongtimedomesticatedshortSRTsystemcanperformagoodnitrogenremovalrate,underthetwoSRTconditions,thenitrogenremovalrateswereallabove96%.Consequently,inordertoreduceN2Oproduction,itisnecessarytokeepalongSRTtoavoidincreasingtheN2Oproductionandconversionrate.Keywords:nitrogenremoval;SRT;N2O1　(Introduction)N2O,(ICCP,1996).320,,120,,NO,.N2O(Peteretal.,1995),N2O(Hanakietal.,1992;Zhengetal.,1994).N2O.N2O,N2O,DOI:10.13671/j.hjkxxb.2009.04.0284:SRTN2O(DO)C/N,SRT,SRT,,.N2O,N2,SRT,N2O.,SRTN2O,N2O.,4,SBR(AB)9d15d,,9d15dN2O,,N2O.2　(Materialsandmethods)2.1　试验用水水质及种泥,1.,4.9d15d,96%.1　Table1　InfluentwatercharacteristicsCOD/NH+4-NCOD/(mg·L-1)TOC/(mg·L-1)NH+4-N/(mg·L-1)TN/(mg·L-1)2.9169.9453.9258.6571.222.2　试验装置与运行(,2009).,14L.,,,80L·h1.SBR(AB).SBR,:300min,120min,120min,20min.SBR、、、、6.,,ASRT9d,B15d.,,1h0.5h,N2O.,N2O.2.3　分析方法2.3.1　DO、pH值和ORP测定　Multi340i(WTW)DO、pHORP.COD、NH+4-N、NO-2-N、NO-3-NMLSS(,2002).TOCTNmultiN/C3000(AnalytikJenaAG)TOC/TN.2.3.2　N2O测定方法　N2O,6890N(Agilent),HP-Plot/(30m×0.53mm×25μm)N2O.:110℃;180℃;ECD300℃.N2O,N2O.,,0.5mL1000mg·L-1HgCl2;N2,0.5h,N2O.N2O.Kimochi(Kimochi,1998).2.3.3　SBR反应器污泥龄的计算方法　,(d),.SRT.,SRT.:θc=VXΔX(1),θc()(d);ΔX,(kg·d-1);X(kg·m-3);V(m3).,SBR,SBR:θc=VXΔX24/H(2)755　　　　　　　　　　29,H(h).3　(Results),9d15d,,96%,、N2ON2O.SRTN2O.N2O2,,;,,N2O.N2O,SRT,SRTN2O.3.1　A反应器污水脱氮过程中N2O的产生情况1　AFig.1　VariationsofnitrogenduringonecycleinreactorAA9d,B,1,9d.NH+4-N52.22mg·L-1,NO-2-N、NO-3-N,300min,,NO-3-N24.35mg·L-1,,120min,60min,NO-2-N、NO-3-N,99%,96%.N2O,.AN2O2,N2O,N2O,,.,60min,,N2O,N2O,30min,,30min,,NH+4-N,60min,N2O30min.,,N2ON2O,N2O240min,.,,,,N2O,N2O,2,300min,N2O4.62mg·L-1.,N2O,,N2O,N2O.9d.N2O4.62mg·L-1,N2O(N2O)11.2%.2　AN2OFig.2　TheproductionofN2OduringonecycleinreactorA3.2　B反应器污水脱氮过程N2O产生情况,B15d,N2O.3BN2ON2O,60min,N2O,N2O,,,N2O7564:SRTN2O,N2O,A,,N2O.3　BN2OFig.3　TheproductionofN2OduringonecycleinreactorBN2O3.8mg·L-1,N2OA,,,N2.N2O.BN2O7.8%.A,N2O.4　(Discussion),,SRT,SRT,(NOB),(AOB),.N2OSRT10d(,2006),9d15dN2O,2,SRTN2O.Hanakizheng,SRT,,,,N2O,,.SRT,SNDN2O,SND,SRT,N2O.2　SRTN2OTable2　TheproductionandconversionrateofN2OSRT/dN2O/(mg·L-1)N2O94.6211.2%153.807.8%5　(Conclusions)1)N2O,N2O.N2O,,N2O,,.2)SRT9d,SBR,96%.3),N2O,N2O.9dN2O15d1.2,4.62mg·L-13.8mg·L-1.N2O,N2O,11.2%7.8%.:彭永臻(1949—),男,博士,教授(博士生导师).研究方向为污水生物处理的理论与应用、污水处理系统的自动控制与智能控制、水环境与污水处理工程的管理信息系统.E-mail:[e-mail].(References):CzepielP,CrillP,HarrissR.1995.Nitrousoxideemissionfrommunicipalwastewatertreatment[J].EnvironmentalScienceTechnology,29:2352—2356HanakiK,ZhengH,MatsuoT.1992.Productionofnitrousoxidegasduringdenitrificationofwastewater[J].WaterScienceandTechnology,26(5-6):1027—1036IPCC.1996.Climatechange:thescienceofclimatechange[M].Cambridge:CambridgeUniversityPress757　　　　　　　　　　29KimochiY,InamoriY,MizuochiM,etal.1998.NitrogenremovalandN2Oemissioninafull-scaledomesticwastewatertreatmentplantwithintermittentaeration[J].JournalofFermentBioengineering,86:202—206,,,.2006.N2O[J].,26(12):1940—1947LiuXH,YangQ,WuCY,etal.2006.N2OemissionsfromdifferentbiologicalnitrogenremovalprocessesandfactorsaffectingN2Oproduction[J].ActaScientiaeCircumstantiae,26(12):1940—1947(inChinese),,,.2009.[J].,29(3):516—520ShangHL,PengYZ,ZhangJL,etal.2009.Theeffectoftemperatureonshort-cutnitrificationanddenitrification[J].ActaScientiaeCircumstant